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Choosing a cervical disc replacement.

Helmut D Link1, Paul C McAfee, Luiz Pimenta

  • 1Cervitech Inc., 300 Roundhill Drive, Rockaway NJ 07866, USA. HD.Link@linkhh.de

The Spine Journal : Official Journal of the North American Spine Society
|November 16, 2004
PubMed
Summary
This summary is machine-generated.

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This study identifies optimal design and biomaterials for cervical disc replacements, focusing on lateral bone anchoring and specific pore sizes for superior bony integration. These findings aim to improve cervical arthroplasty outcomes.

Area of Science:

  • Biomedical Engineering
  • Orthopedic Surgery
  • Materials Science

Background:

  • Basic scientific studies measured volumetric density of longitudinal bony columns in the cervical vertebra.
  • The strongest bone is located laterally, near the uncovertebral joints, with a radial pattern.

Purpose of the Study:

  • To define the ideal footprint, profile, and biomaterials for cervical disc replacement prostheses.
  • Characterize optimal design for enhanced cervical disc replacement.

Main Methods:

  • Compilation of biomechanical and anatomical studies.
  • Microcomputed tomographic imaging used to quantify trabecular density and mineral distribution in human cervical vertebrae.

Main Results:

  • Lateral cervical vertebrae experience higher bending loads, necessitating prosthesis anchoring in the lateral uncovertebral bone.

Related Experiment Videos

  • A rectangular prosthesis design and TiCaP (titanium/calcium phosphate) coating with 20-30 micron pores enhance bony integration.
  • TiCaP coating promotes superior bony integration through hydroxyapatite reprecipitation.

    • Conclusions:

    • Cervical spine kinematics indicate significantly lower loads (50 N/segment) compared to the lumbar spine.
    • Wear characteristics of conventional biomaterials suggest minimal particulate debris generation in cervical arthroplasty.